Does your league have Holds as a category? If not why do you still have Uehara on your roster, I'd drop him and pickup Carp. If you do have Holds as a cat then I'd drop Kipnis since you already have Ackley who should be your starting 2B (more upside than Kipnis).

id drop koji in a heartbeat for carp...ride out carps streak...and IF he dies out u can always pick up a koji, chapman type middle reliever as there are prob at least 5 good ones available for you down the line